工程科学学报2017，Vol.39Issue(5)：655-662,8.DOI:10.13374/j.issn2095-9389.2017.05.002
模拟深海采矿混响环境实验装置研究
Experimental device for simulating reverberation environment in deep sea mining
摘要
Abstract
To solve the difficult problem of ultrasonic signal acquisition with respect to real-time tiny terrain detection in the deep-sea mining environment, an experimental ultrasonic detection system was designed and built that can simulate the real deep-sea mining reverberation environment. Using a simplified structure for the spiral mining head as a basis, Fluent software was used to simulate the impact of a spiral mining head and a multiple-impeller on the underwater flow field. A comparison of the results shows that the impeller model can realistically reflect the mining environment. Then, based on the impeller model, the vertical distribution of the sediment volume fractions is experimentally determined and the correctness of the design model is verified. Finally, an ultrasonic detection experiment is conducted and the results show that suspended sediment can generate viscosity and absorb sound waves, thereby causing serious reverberation interference. By implementing time-gain compensation in the ultrasonic detection system, the reverberation inter-ference can be effectively suppressed and the probability of target detection increases. The results of this study provide a basis for stud-ying ultrasonic microtopography detection in the deep sea mining reverberation environment.关键词
深海采矿/实验系统/模拟采矿环境/超声探测/钴结壳Key words
deep-sea mining/experiment system/simulated mining environment/ultrasonic detection/cobalt crust分类
通用工业技术引用本文复制引用
郝奇,赵海鸣,姬雅倩,王艳丽..模拟深海采矿混响环境实验装置研究[J].工程科学学报,2017,39(5):655-662,8.基金项目
国家自然科学基金资助项目(51374245) （51374245）
中南大学中央高校基本科研业务费专项资金资助项目(2015zzts196) （2015zzts196）
